Record history of Cunningham Chain length 4

first member Digits When? Discoverer

1st kind
 
13720852541 ⋅ 7877# - 1
3384
31 Oct 2016
Angel, Augustin, NewPGen, OpenPFGW
28961560189 ⋅ 7517# - 1
3217
9 Sep 2016
Angel, Augustin, NewPGen, OpenPFGW
375967981369 ⋅ 6907# - 1
2971
31 May 2017
Östlin, NewPGen, OpenPFGW
354362289656 ⋅ 6907# - 1
2971
31 May 2017
Östlin, NewPGen, OpenPFGW
285993323512 ⋅ 6907# - 1
2971
31 May 2017
Östlin, NewPGen, OpenPFGW
28904981097 ⋅ 6703# - 1
2882
20 Mar 2015
Batalov, NewPGen, OpenPFGW
1249097877 ⋅ 6599# - 1
2835
Feb 2011
Angel, NewPGen, OpenPFGW
119184698 ⋅ 5501# - 1
2354
Jun 2005
Sun, NewPGen, OpenPFGW
1707223185 ⋅ 3049# - 1
1308
Sep 2001
Angel, Augustin, Jobling, NewPGen, OpenPFGW
742155874 ⋅ 2381# - 1
1019
Aug 2000
Angel, Augustin, Jobling, NewPGen, OpenPFGW
35443364 ⋅ 1013# - 1
429
10 Jun 2000
Augustin, NewPGen, OpenPFGW

2nd kind
 
49325406476 ⋅ 9811# + 1
4233
10 Jul 2019
Östlin, NewPGen, OpenPFGW
259056632602 ⋅ 7699# + 1
3315
2 Jun 2019
Batalov, NewPGen, OpenPFGW
17285145467 ⋅ 6977# + 1
3005
26 Jul 2016
Angel, Augustin, NewPGen, OpenPFGW
35598436282 ⋅ 6701# + 1
2878
19 Mar 2015
Batalov, NewPGen, OpenPFGW
96557970905 ⋅ 5303# + 1
2271
4 Aug 2019
DavisK, Underwood, NewPGen, PrimeForm_egroup, OpenPFGW
1453501013 ⋅ 4127# + 1
1770
Mar 2005
Sun, NewPGen, PrimeForm
153344568 ⋅ 4001# + 1
1711
Apr 2004
Sun, NewPGen, PrimeForm
131853904032 ⋅ 3061# + 1
1313
Jan 2003
Broadhurst, PrimeForm
356701232 ⋅ 3041# + 1
1303
Sep 2002
Angel, Augustin, Jobling, NewPGen, OpenPFGW
92406026 ⋅ 1187# + 1
506
17 Jun 2000
Augustin, NewPGen, OpenPFGW
164285535 ⋅ 2972 + 1
301
Jan 2000
Augustin, Proth
723592485 ⋅ 2770 + 1
241
Oct 1999
Augustin, Proth